home *** CD-ROM | disk | FTP | other *** search
Java Source | 1998-12-01 | 3.9 KB | 120 lines |
- /*
- * @(#)Blink.java 1.5 98/06/29
- *
- * Copyright (c) 1997, 1998 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
- * modify and redistribute this software in source and binary code form,
- * provided that i) this copyright notice and license appear on all copies of
- * the software; and ii) Licensee does not utilize the software in a manner
- * which is disparaging to Sun.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
- * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
- * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
- * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
- * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
- * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
- * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
- * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- * This software is not designed or intended for use in on-line control of
- * aircraft, air traffic, aircraft navigation or aircraft communications; or in
- * the design, construction, operation or maintenance of any nuclear
- * facility. Licensee represents and warrants that it will not use or
- * redistribute the Software for such purposes.
- */
-
- import java.awt.*;
- import java.util.StringTokenizer;
-
- /**
- * I love blinking things.
- *
- * @author Arthur van Hoff
- * @modified 04/24/96 Jim Hagen use getBackground
- * @modified 02/05/98 Mike McCloskey removed use of deprecated methods
- */
-
- public class Blink extends java.applet.Applet implements Runnable
- {
- Thread blinker = null; // The thread that displays images
- String labelString; // The label for the window
- int delay; // the delay time between blinks
-
- public void init() {
- String blinkFrequency = getParameter("speed");
- delay = (blinkFrequency == null) ? 400 :
- (1000 / Integer.parseInt(blinkFrequency));
- labelString = getParameter("lbl");
- if (labelString == null)
- labelString = "Blink";
- Font font = new java.awt.Font("TimesRoman", Font.PLAIN, 24);
- setFont(font);
- }
-
- public void paint(Graphics g) {
- int fontSize = g.getFont().getSize();
- int x = 0, y = fontSize, space;
- int red = (int)( 50 * Math.random());
- int green = (int)( 50 * Math.random());
- int blue = (int)(256 * Math.random());
- Dimension d = getSize();
- g.setColor(Color.black);
- FontMetrics fm = g.getFontMetrics();
- space = fm.stringWidth(" ");
- for (StringTokenizer t = new StringTokenizer(labelString); t.hasMoreTokens();) {
- String word = t.nextToken();
- int w = fm.stringWidth(word) + space;
- if (x + w > d.width) {
- x = 0;
- y += fontSize;
- }
- if (Math.random() < 0.5)
- g.setColor(new java.awt.Color((red + y*30) % 256, (green + x/3) % 256, blue));
- else
- g.setColor(getBackground());
- g.drawString(word, x, y);
- x += w;
- }
- }
-
- public void start() {
- blinker = new Thread(this);
- blinker.start();
- }
-
- public void stop() {
- blinker = null;
- }
-
- public void run() {
- Thread me = Thread.currentThread();
- while (blinker == me) {
- try {
- Thread.currentThread().sleep(delay);
- }
- catch (InterruptedException e) {
- }
- repaint();
- }
- }
-
- public String getAppletInfo() {
- return "Title: Blinker\nAuthor: Arthur van Hoff\nDisplays multicolored blinking text.";
- }
-
- public String[][] getParameterInfo() {
- String pinfo[][] = {
- {"speed", "string", "The blink frequency"},
- {"lbl", "string", "The text to blink."},
- };
- return pinfo;
- }
-
- }
-
-